Two-part mine stanchion



Feb. 17, 1942. H. TOUSSAINT ETAL.

TWO-PART MINE STANCHION Filed Sept. 28, 1959 Patented Feb. 17, 1942 UNITED STATES PATENT OFFICE y 2,273,389 Two-PART MINE sTANoHIoN many Application September 28, 1939, Serial No. 297,008 In Germany September 22, 1938 f 4 Claims.

This invention relates to a two-part iron mine `stanchion of that type in which a wedge-shaped upper stemple is guided in a lower stemple provided at its upper end with a Xed wedgedshaped pocket and in which lower stemple, the two parts thereof are adjustably clamped together in the pocket by a wedge gear. The invention is characterized by the special method of bringing the clamping elements into relationship with one another and with the two halves of the stanchion. The essential features are as follows.

The main clamping element is a single vertically guided wedge which has such an inclination that the self-locking is released and during the descent of the inner stemple under load, this descent of the inner stemple is practically not impeded because the vertically guided wedge is displaced under the shearing action of the inner stemple.

This displacementJ of the longitudinal wedge is prevented according to the invention by a clamping member or is regulated in direct action. The said clamping member, which is placed in the path of the longitudinal wedge, secures and clamps the longitudinal wedge and renders possible with its release, by releasing a longitudinal movement of the longitudinal wedge, a simple abstraction of the stemple. The very simple construction of the wedge gear and the most reliable action thereof are obtained according to the invention when the longitudinal wedge is penetrated by the clamping member. The abutment of the clamping member is thus placed in the wedge pocket.

Not only a compact form and small weight are obtained by the said constructional form but also a structure which enables the miner to superintend the operation and facilitates the working with the stemple.

A special advantage of the said simple structure is that such a stemple can be used without special means as a practically rigid stemple and also as a flexible stemple. It is particularly advantageous that the clamping member' can also be easily released.

The use of clamping members in wedge locks of two-part stanchions, in which by a corresponding angle measurement, the self-locking of the wedge is released, is already known in various forms. It is also known to use transverse wedges or wedges acting in a transverse direction as securing or clamping elements in which the wedging serves for rmly holding the inner stemple and for the adjustment thereof at different heights or levels.

It is also known to construct a two-part stanchion in which the wedgy inner stemple acts on a horizontally and vertically displaceable wedge-shaped piece, which slides along an inclined surface and in which the self-locking is released by a corresponding angle measurement, the securing and adjustment being effected by a further wedge.

The same arrangement as above and also Vice versa has been proposed wherein the sinking movement of the inner stemple is transmitted to a wedge-shaped piece which is adapted to move only horizontally and exerts with its horizontal movement a force on a non-self-locking wedge, whose vertical movement is arrested by a resilient abutment and corresponding transverse securing means.

A similar structure but in double arrangement has also become known in which the regulating member, a wedge, has been placed transversely in a known manner.

Moreover, two-part stanchions, have become known which have clamping wedges working without self-locking, in which these clamping wedges were designed as yokes which arranged in pairs embraced each other and in which one wedge yoke is secured and the other wedge yoke is movable but is arrested by a fastening member.

All of the above described devices are not simple enough for the mine. The plurality of the parts in the structure of the clamping gear not only renders the stanchion expensive but also partly prevents the practical use thereof. In contradistinction thereto, the stanchion is not only simplied per se by the above-described structure according to the present invention but the absolute function and the simple abstraction of the stanchion is also simultaneously ensured while the inner stemple is always arrested again when sinking.

The simplest and most reliable structural form of the stanchion according to the invention is attained if the clamping member placed in the path of the longitudinal wedge penetrates the latter as a transverse wedge and encounters in the walls of the wedge pocket an abutment relative to the clamping movement. An eccentric or the like may also be used as clamping member instead of a transverse Wedge.

The stanchion according to the invention will hereinafter be fully explained with reference to the accompanying drawing.

Figures 1 and 2 are longitudinal views or elevations (front and transverse) of a constructional form of the invention.

The inner stemple lil is guided in the outer stemple Il in the usual manner. The inner stemple l is wedge-shaped and the wedge inclination may vary according to the desired flexibility.

The outer stemple Il is provided at its upper end in the usual manner with the wedge pocket I2 in which the longitudinal wedge I3 is guided ydirectly against the inner stemple Il). The inner stemple I!) bear directly against the longitudinal wedge I3 which in its turn is guided in the pocket at an angle which is greater than the angle determining the self-locking. For example, the angle at th'e side I4 of the wedge I3 which is against the pocket exceeds 25 so that when the inner stemple I@ descends, the longitudinal wedge i3 moves out of its seat in the lpocket I2.

However, the longitudinal wedge 3 is prevented by the transverse wedge I5 from making the said movement, which transverse wedge penetrates the wedge pocket I2 and the longitudinal wedge i3. The slot I6 in the longitudinal wedge I3 for receiving the transverse wedge I5 is made large enough so as to conform to the transverse and upward movement of th'e longitudinal wedge. The upper side il of the transverse wedge i5 encounters an abutment on the faces IS in the pocket I2 and the lower side I9 of the transverse wedge I5 receives its clamping surface in the slotted bottom 2S of the longitudinal wedge i3.

The two parts of the stanchion may be held tcgether with the wedge gear in the known manner. After the insertion of the inner stemple an abut ment 2i is provided on the end thereof and the abutment 2! bears in front of the point of the longitudinal wedge I3 when the inner stemple is pushed out of the outer stemple.

The head 22 of the transverse wedge l5 is so designed or the wedge has such an inclination that the tranverse wedge' is inserted with its thick end through the slots IS and 24 in wedge I3 and pocket IZ and cannot move out of the slot 23 of the pocket I2. Projections 24 on the transverse wedge I5 prevent the loss in the other direction or they form the outermost abutment during the operation, The timbering with suitable means may take place in the usual manner. After the inner stemple is pressed against the hanging wall with the aid of the timbering means, the longitudinal wedge I3 is lowered by the gear of the transverse wedge and the inner stemple is clamped in its position in the outer stemple. The clamping together between the pocket in the surfaces I8 ythereof and in the slotted bottom 2B of the longitudinal wedge is effected by blows against the head 22 of the transverse wedge I5. During the clamping of the transverse wedge I5, the longitudinal wedge is drawn downward and against th'e inner stemple. The stanchion moves downward under the action of th'e load or weight of the stanchion and tends to force the longitudinal wedge out of the pocket but the stanchion is prevented by the transverse wedge I5 from forcing the longitudinal wedge out of the pocket.

For the abstraction of the stanchion, only a comparatively slight blow against the head 24 of the tranverse wedge I5 is necessary in order to release the clamping of the longitudinal wedge and to lower the inner stemple Il). According to the force of the releasing blow, it is also possible to accelerate more or less the lowering of the stanchion and to accelerate more or less the abstraction thereof. It is thereby also possible to determine the extent to which both halves of the stanchion can be moved together because tn'e inner sternple can always engage again with the longitudinal wedge when the transverse wedge is only slightly raised.

Metal lies against metal wherever there is a direct clamping of the inner stemple I9 in the outer stemple II over the longitudinal wedge I3 by means of the transverse wedge. Single parts are thereby brought into relationship with one another so that the exibility of the stanchion only depends on the elasticity of the material. The stanchion or stemple thus acts like a socalled rigid stemple.

Having thus fully described the invention what is claimed as new and desired to be secured by- Letters Patent is:

1. In a two-part metallic mine stanchion of the type including a lower stemple, and an upper stemple slidably mounted in said lower stemple, the improvement which consists in means for clamping said upper stemple in place in said lower stemple, comprising a wedge-shaped pocket on the upper end of said lower stemple, a longitudinal wedge vertically guided in said pocket, the inner face of said wedge cooperating with th'e adjacent face of said upper stemple, the angle of the inclined opposite face of said wedge being less than the angle of inclination of said pocket wh'ereby said upper stemple is normally released, and means extending transversely through the wall of said pocket and said longitudinal wedge for clamping said wedge in place in clamping engagement with said upper stemple.

2. A two-part metallic mine stanchion, comprising a lower stemple, a wedge-shaped upper stemple vertically slidably in said lower stemple, a wedge-shaped pocket on the upper end of said lower stemple, a longitudinal wedge vertically guided in said pocket, one face of said wedge cooperating with the wedge face of said upper stemple, the opposite face of said wedge being inclined at an angle less than that of said pocket, whereby during the descent of said upper stemple in said lower stemple, said wedge will be displaced in said pocket by shearing action of said upper stemple, to normally release said wedge, and a transverse member extending through said pocket and wedge for clamping th'e latter in engagement with the Wedge face of said upper stemple, to lock said stemple in place.

3. A two-part metallic mine stanchion, comprising a lower stemple, a wedge-shaped upper stemple vertically slidable in said lower stemple, a wedge-shaped pocket on the upper end of said lower stemple having vertically inclined slots in the opposite walls, a longitudinal wedge vertically guided in said pocket and provided with a longitudinally extending transverse slot, one face of said wedge cooperating with' the adjacent wedge face of said upper stemple, the opposite face of said wedge being inclined at an angle less than that of said pocket, whereby during the descent of said upper stemple in said lower stemple, said wedge will be displaced in said pocket by shearing action of said upper stemple, to normally release said wedge, and a transverse wedge extending through the slot in said longitudinal wedge for clamping said longitudinal wedge against the wedge face of said upper stemple to lock the latter in place, said wedge being guided in said vertically inclined slots in said pocket, the angle of inclination of said slots being equal to the resultant of both of said wedge faces.

4. A two-part mine stanchion as claimed in claim 3, in which the transverse wedge ensures the holding together of the stanchion in that the transverse wedge is provided with such a thick end that it can only be inserted in the slots of the longitudinal wedge and the pocket before the insertion of the inner upper stemple,

HEINRICH TOUSSAINT. KARL .'MARIA GROETSCHEL. KARL THEODOR JASPER. 

